From 78a5ef9d2c034b5a6314fb66279160331d25cc73 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Sat, 25 Aug 2018 19:36:06 +0200
Subject: ping: use setitimer() instead of ualarm()
function old new delta
sendping_tail 218 265 +47
ualarm 79 - -79
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/0 up/down: 47/-79) Total: -32 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
networking/ping.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/networking/ping.c b/networking/ping.c
index a579ea4ae..570184fee 100644
--- a/networking/ping.c
+++ b/networking/ping.c
@@ -485,9 +485,15 @@ static void sendping_tail(void (*sp)(int), int size_pkt)
bb_error_msg_and_die(bb_msg_write_error);
if (pingcount == 0 || G.ntransmitted < pingcount) {
- /* Didn't send all pings yet - schedule next in 1s */
+ /* Didn't send all pings yet - schedule next in -i SEC interval */
+ struct itimerval i;
signal(SIGALRM, sp);
- ualarm(G.interval_us, 0);
+ /*ualarm(G.interval_us, 0); - does not work for >=1sec on some libc */
+ i.it_interval.tv_sec = 0;
+ i.it_interval.tv_usec = 0;
+ i.it_value.tv_sec = G.interval_us / 1000000;
+ i.it_value.tv_usec = G.interval_us % 1000000;
+ setitimer(ITIMER_REAL, &i, NULL);
} else { /* -c NN, and all NN are sent */
/* Wait for the last ping to come back.
* -W timeout: wait for a response in seconds.
--
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